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///////////////////////////////////////////////////////////////////////////////
// Name: wx/msw/subwin.h
// Purpose: helper for implementing the controls with subwindows
// Author: Vadim Zeitlin
// Modified by:
// Created: 2004-12-11
// Copyright: (c) 2004 Vadim Zeitlin <vadim@wxwindows.org>
// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
#ifndef _WX_MSW_SUBWIN_H_
#define _WX_MSW_SUBWIN_H_
#include "wx/msw/private.h"
// ----------------------------------------------------------------------------
// wxSubwindows contains all HWNDs making part of a single wx control
// ----------------------------------------------------------------------------
class WXDLLIMPEXP_CORE wxSubwindows
{
public:
// the number of subwindows can be specified either as parameter to ctor or
// later in Create()
wxSubwindows(size_t n = 0) { Init(); if ( n ) Create(n); }
// allocate enough space for the given number of windows
void Create(size_t n)
{
wxASSERT_MSG( !m_hwnds, wxT("Create() called twice?") );
m_count = n;
m_hwnds = (HWND *)calloc(n, sizeof(HWND));
m_ids = new wxWindowIDRef[n];
}
// non-virtual dtor, this class is not supposed to be used polymorphically
~wxSubwindows()
{
for ( size_t n = 0; n < m_count; n++ )
{
if ( m_hwnds[n] )
::DestroyWindow(m_hwnds[n]);
}
free(m_hwnds);
delete [] m_ids;
}
// get the number of subwindows
size_t GetCount() const { return m_count; }
// access a given window
HWND& Get(size_t n)
{
wxASSERT_MSG( n < m_count, wxT("subwindow index out of range") );
return m_hwnds[n];
}
HWND operator[](size_t n) const
{
return const_cast<wxSubwindows *>(this)->Get(n);
}
// initialize the given window: id will be stored in wxWindowIDRef ensuring
// that it is not reused while this object exists
void Set(size_t n, HWND hwnd, wxWindowID id)
{
wxASSERT_MSG( n < m_count, wxT("subwindow index out of range") );
m_hwnds[n] = hwnd;
m_ids[n] = id;
}
// check if we have this window
bool HasWindow(HWND hwnd)
{
for ( size_t n = 0; n < m_count; n++ )
{
if ( m_hwnds[n] == hwnd )
return true;
}
return false;
}
// methods which are forwarded to all subwindows
// ---------------------------------------------
// show/hide everything
void Show(bool show)
{
int sw = show ? SW_SHOW : SW_HIDE;
for ( size_t n = 0; n < m_count; n++ )
{
if ( m_hwnds[n] )
::ShowWindow(m_hwnds[n], sw);
}
}
// enable/disable everything
void Enable(bool enable)
{
for ( size_t n = 0; n < m_count; n++ )
{
if ( m_hwnds[n] )
::EnableWindow(m_hwnds[n], enable);
}
}
// set font for all windows
void SetFont(const wxFont& font)
{
HFONT hfont = GetHfontOf(font);
wxCHECK_RET( hfont, wxT("invalid font") );
for ( size_t n = 0; n < m_count; n++ )
{
if ( m_hwnds[n] )
{
::SendMessage(m_hwnds[n], WM_SETFONT, (WPARAM)hfont, 0);
// otherwise the window might not be redrawn correctly
::InvalidateRect(m_hwnds[n], NULL, FALSE /* don't erase bg */);
}
}
}
// find the bounding box for all windows
wxRect GetBoundingBox() const
{
wxRect r;
for ( size_t n = 0; n < m_count; n++ )
{
if ( m_hwnds[n] )
{
RECT rc;
::GetWindowRect(m_hwnds[n], &rc);
r.Union(wxRectFromRECT(rc));
}
}
return r;
}
private:
void Init()
{
m_count = 0;
m_hwnds = NULL;
}
// number of elements in m_hwnds array
size_t m_count;
// the HWNDs we contain
HWND *m_hwnds;
// the IDs of the windows
wxWindowIDRef *m_ids;
wxDECLARE_NO_COPY_CLASS(wxSubwindows);
};
// convenient macro to forward a few methods which are usually propagated to
// subwindows to a wxSubwindows object
//
// parameters should be:
// - cname the name of the class implementing these methods
// - base the name of its base class
// - subwins the name of the member variable of type wxSubwindows *
#define WX_FORWARD_STD_METHODS_TO_SUBWINDOWS(cname, base, subwins) \
bool cname::ContainsHWND(WXHWND hWnd) const \
{ \
return subwins && subwins->HasWindow((HWND)hWnd); \
} \
\
bool cname::Show(bool show) \
{ \
if ( !base::Show(show) ) \
return false; \
\
if ( subwins ) \
subwins->Show(show); \
\
return true; \
} \
\
bool cname::Enable(bool enable) \
{ \
if ( !base::Enable(enable) ) \
return false; \
\
if ( subwins ) \
subwins->Enable(enable); \
\
return true; \
} \
\
bool cname::SetFont(const wxFont& font) \
{ \
if ( !base::SetFont(font) ) \
return false; \
\
if ( subwins ) \
subwins->SetFont(font); \
\
return true; \
}
#endif // _WX_MSW_SUBWIN_H_
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